Roller blind web for a protective device of a vehicle interior

ABSTRACT

Roller blind sheet for a protective device of a vehicle interior compartment, including a flexible two-dimensional structure which is displaceable between a pulled-out protective position and a compactly stored rest position in a vehicle interior. The two-dimensional structure is associated with lateral reinforcing metal tapes on opposite longitudinal sides thereof, and in the assembled state the tapes are guided in vehicle-related, lengthwise shiftable guiding rails. On the longitudinal sides of the two-dimensional structure, thin connecting strands made of metal are fixed, which are welded to the respective metal tape using a plurality of welding spots spaced along the longitudinal direction of the longitudinal sides.

The invention relates to a roller blind sheet for a protective device of a vehicle interior compartment, comprising a flexible two-dimensional structure which is displaceable between a pulled-out protective position and a compactly stored rest position in a vehicle interior, wherein the two-dimensional structure is associated with lateral reinforcing tapes on opposite longitudinal sides thereof, and in the assembled state said tapes are guided in vehicle-related guiding rails to be lengthwise shiftable, wherein the reinforcing tapes are embodied as metal tapes.

Such a roller blind sheet for a shading device of a transparent glass roof zone of a passenger vehicle is generally known. The roller blind sheet is designed as a flexible, textile fabric which is held on a winding shaft for winding on and off. On each of opposite longitudinal sides the fabric has a lateral selvedge, into which a reinforcing tape in the form of a metal tape is sewn in. For that purpose, the respective selvedge of the fabric is folded about the reinforcing tape so that the reinforcing tape embodied as a metal tape is held in a pocket formed by the selvedge of the fabric. The longitudinal sides of the fabric are guided in vehicle-related guiding rails on the sides of the glass roof zone to be lengthwise shiftable. For that purpose, the reinforcing tapes are inserted into the guiding rails and retained in a form-fitting manner within the guiding rails transversely to the pull-out direction of the fabric. The lateral guiding of the fabric ensures that the fabric is held spread out transversely to the pull-out direction and, consequently, is not sagging towards the center.

An object of the invention is to provide a roller blind sheet of the above mentioned type, which is capable of maintaining a robust and long-lasting transverse spreading function in a protective position within a vehicle interior compartment.

The object is achieved in that on the longitudinal sides of the two-dimensional structure thin connecting strands made of metal are fixed, which are welded to the respective metal tape using a plurality of welding spots spaced along the longitudinal direction of the longitudinal sides. Thereby, a particularly robust connection between the longitudinal sides of the two-dimensional structure and the reinforcing tapes designed as metal tapes is created. The solution according to the invention is adapted to protective devices in a vehicle interior, provided for shading of glass pane areas, like in particular glass roof zones, side or rear windows, or for horizontal luggage compartment covering or for approximately vertical partitioning of a luggage compartment within the vehicle interior.

According to the invention, a metal string or metal wire or a thin and narrow metal strip or a similarly designed thin metal profile is provided as the thin connecting strand made of metal. Preferably, on each of the longitudinal sides, there is merely one single connecting strand provided. It is also possible, to fix two or more thin connecting strands on each of the longitudinal sides. Advantageously, welding is by means of corresponding welding spots using a laser welding method, which allows particularly exact positioning of welding spots by means of corresponding laser control.

In an embodiment of the invention, each metal tape is associated with a respective connecting strand, wherein the metal tape and the connecting strand are arranged on opposite surface sides of the two-dimensional structure and connected to each other across and through a material thickness of the two-dimensional structure. Thus, the metal tape and the connecting strand are provided on the upper and lower sides in the region of each longitudinal side of the two-dimensional structure, and welded to each other across and through the two-dimensional structure by means of corresponding welding spots.

In a further embodiment of the invention, each connecting strand is designed as a metal string which is connected to the two-dimensional structure using textile weaves and laid out along the longitudinal side of the two-dimensional structure, in particular in a zig-zag line. The zig-zag line can be laid out in the type of a sinus curve by alternated guiding of the metal string in an angled or a round pattern. What is meant by “textile weaves” are connections between the metal string and the two-dimensional structure by sewing using additional filamentous material or even by embedding the metal string during the textile production of the two-dimensional structure, in particular by incorporating the metal string in a corresponding woven or knitted fabric, which is the two-dimensional structure.

In a further embodiment of the invention, at least one row of holes extending in the longitudinal direction is provided in the two-dimensional structure, which holes are traversed by the metal string and the metal string is connected to the metal tape by corresponding welding spots through and across said holes. The holes provided prevent a risk of thermal damage to the two-dimensional structure due to the fixing of the welding spots.

In a further embodiment of the invention, the metal string and the metal tape are made of steel. As a result, on the one hand, a particularly good material-bonding engagement between metal string and metal tape is obtainable. On the other hand, steel has a particularly high strength so that the roller blind sheet can undergo a constant transverse spreading function over a long period.

In a further embodiment of the invention, the two-dimensional structure is a textile fabric in the form of a woven or knitted fabric, or in the form of a single-layer or multi-layer film sheet. In case the two-dimensional structure is a multi-layer film sheet, corresponding individual film layers are interconnected across the entire surface area of the two-dimensional structure by laminating.

In a further embodiment of the invention, the metal string is incorporated into the woven or knitted fabric by textile techniques. Incorporation of the metal string can be as early as during the mechanical manufacturing of the woven or knitted fabric, or the metal string is subsequently pulled or pushed into the woven or knitted fabric which is the two-dimensional structure.

The invention also relates to a protective device for a vehicle interior compartment, comprising a roller blind sheet configured according to the explanations above.

Further advantages and features of the invention will become apparent from the claims and the description given below of a preferred exemplary embodiment of the invention illustrated with reference to the drawings.

FIG. 1 shows schematically an embodiment of a roller blind sheet according to the invention for a shading device of a glass roof zone of a passenger vehicle;

FIG. 2 shows schematically a section of the shading device provided with the roller blind sheet according to FIG. 1;

FIG. 3 shows schematically the roller blind sheet according to FIG. 1 in a condition partially wound-up on a winding shaft;

FIG. 4 shows schematically an explosion view of a longitudinal side region of the roller blind sheet according to FIGS. 1 to 3; and

FIG. 5 shows in an enlarged schematic cross-sectional view a section of the roller blind sheet according to FIGS. 1 to 4 in the region of a welding of an upper-sided metal strip to a lower-sided metal tape.

A passenger vehicle 1 according to FIG. 1 includes a vehicle roof provided with a roof opening portion. The roof opening portion can be closed or exposed by a movable glass roof 2. The glass roof 2 is associated with a shading device on an inner side facing the vehicle interior, in order to allow shading of the vehicle interior from solar radiation penetrating the glass roof 2. The shading device includes a roller blind sheet comprising a flexible two-dimensional structure 3, in the present case in the form of a multi-layered film sheet. The two-dimensional structure 3 is mounted on a winding shaft 4 for winding on and off, which shaft is arranged in a manner fixed to the vehicle and rotatably mounted within the vehicle interior directly behind the glass roof 2. The two-dimensional structure 3 has, on its face end region that is in front in the pull-out direction, a dimensionally stable pull-out profile (not illustrated in more detail) which is held in vehicle-fixed guiding rails for longitudinal shifting.

The two-dimensional structure 3 is provided with a respective reinforcing tape 6 on each of the opposite longitudinal sides thereof, which tape presents sufficient flexibility, in order to be wound onto or wound off the winding shaft 4 together with the two-dimensional structure 3 (FIG. 3). Each reinforcing tape 6 is embodied as a metal tape and guided to be lengthwise shiftable in a respective vehicle-fixed guiding rail 5 disposed within the vehicle interior below a respective side edge of the glass roof 2. Each reinforcing tape 6 is firmly connected to the respective longitudinal side of the two-dimensional structure 3 over the entire length of the two-dimensional structure 3 so that the two reinforcing tapes 6 together with the two-dimensional structure 3 can be pulled off the winding shaft 4 or wound onto said shaft.

The two reinforcing tapes 6 are connected to the opposite longitudinal sides of the two-dimensional structure 3 by a plurality of welding spots 7 extending uniformly over the length of the respective reinforcing tape 6. For that purpose, the two-dimensional structure 3 includes, on a surface side opposite the reinforcing tape 6, a connecting strand 8 in the form of a metal string which is guided in a zig-zag pattern along the longitudinal side of the two-dimensional structure 3 and sewn to the two-dimensional structure 3 via loop-shaped stitching points 9. A respective row of holes 10 is provided in the two-dimensional structure 3 in the region of each longitudinal side, which holes are disposed in the longitudinal direction of the two-dimensional structure 3, mutually spaced at uniform intervals and penetrate a material thickness of the two-dimensional structure 3 completely (FIGS. 4 and 5). The zig-zag pattern of the connecting strand 8 embodied as a metal string in the region of each of the two longitudinal sides of the two-dimensional structure 3 is selected such that the connecting strand 8 traverses each hole 10 on the surface side of the two-dimensional structure 3 located opposite to the reinforcing tape 6. The connecting strand 8 is embodied as a steel string or as a steel wire and is welded in the region of each hole 10 to the reinforcing tape 6, likewise made of steel, using the already described welding spots 7. The welding spots 7 are set coaxially to the holes 10 of the two-dimensional structure 3 in high precision using laser welding. The energy input due to the laser welding is so exact and spatially limited that the edges of each of the holes 10 is not or not significantly subject to thermal stresses due to the welding procedure so that there is no damage to the two-dimensional structure 3 occurring as a result of the welding. In the exemplary embodiment as illustrated, the connecting strand 8 in the form of the metal string is provided in the region of the upper side of the two-dimensional structure 3, whereas the reinforcing tape 6 is positioned complementary and opposite on the lower side of the two-dimensional structure 3. In an alternative embodiment of the invention, the reinforcing tape 6 is positioned in the region of the upper side and the connecting strand in the form of the metal string sewn to the two-dimensional structure 3 in the region of the lower side of the two-dimensional structure. Welding is performed in an analogous manner through and across the holes 10. 

1. Roller blind sheet for a protective device of a vehicle interior compartment, comprising a flexible two-dimensional structure which is displaceable between a pulled-out protective position and a compactly stored rest position in a vehicle interior, wherein the two-dimensional structure is associated with lateral reinforcing tapes on opposite longitudinal sides thereof, and in the assembled state said tapes are guided in vehicle-related guiding rails to be lengthwise shiftable, wherein the reinforcing tapes are embodied as metal tapes, wherein on the longitudinal sides of the two-dimensional structure thin connecting strands made of metal are fixed, which are welded to the respective metal tape using a plurality of welding spots spaced along the longitudinal direction of the longitudinal sides.
 2. Roller blind sheet according to claim 1, wherein each metal tape is associated with a respective connecting strand, wherein the metal tape and the connecting strand are arranged on opposite surface sides of the two-dimensional structure and connected to each other across and through a material thickness of the two-dimensional structure.
 3. Roller blind sheet according to claim 1, wherein each connecting strand is designed as a metal string which is connected to the two-dimensional structure by textile weaves and laid out along the longitudinal side of the two-dimensional structure, in particular in a zig-zag line.
 4. Roller blind sheet according to claim 1, wherein at least one row of holes extending in the longitudinal direction is provided in the two-dimensional structure, which holes are traversed by the metal string and the metal string is connected to the metal tape by corresponding welding spots through and across said holes.
 5. Roller blind sheet according to claim 4, wherein the metal string and the metal tape are made of steel.
 6. Roller blind sheet according to claim 1, wherein the two-dimensional structure is a textile fabric in the form of a woven or knitted fabric, or in the form of a single-layer or multi-layer film sheet.
 7. Roller blind sheet according to claim 1, wherein the metal string is incorporated into the woven or knitted fabric by textile techniques.
 8. Protective device for a vehicle interior compartment, comprising a roller blind sheet according to claim
 1. 